Louisa D. Pickens, Tennessee to Alabama

Louisa D. Pickens, b. 1849 in Tennessee, married Dr. John Bunyan Harvley in Alabama.They lived in Sumter County, Alabama, and by 1900 were in Mobile, Alabama.I would appreciate any information on the ancestry of Louisa D. Pickens.

I read a message that she was buried at Umbria Plantation near Sawyerville, Al, but I have no documentation.